4As Satou and the Ring Princesses march toward their final battle with the Abyss King in Vanna, it's up to Amber to guide them through the Dwarves' labyrinth to the other side of the mountain. But when they enter the shafts, Amber begins acting strangely, leading the group deeper and deeper underground until they reach an abandoned city. Hidden in the lifeless walls are the last sentiments and wishes of the Dwarf Nation. How will their discoveries shape Amber's future and the fate of the whole world?